In the years since living as an entitled noble scion, who engaged in petty corruption and racketeering. Maximilian had redeemed himself through service to the German Reich, acting as an agent of Military Intelligence.
During the Great War he had received great honors for being the man to inspire and lead the Arab Rebellion against the Ottoman Empire, while Bruno had brokered the agreement that stabilized the region after the war was over, Maximilian was in the deserts fighting as one of them, and earning the respect of the Sharif of Mecca.
Now however, Maximilian was continuing with his efforts, though thoroughly redeemed in the eyes of his family, peers, and superiors. Maximilian felt he had not yet given enough and undertook the dangerous task of infiltrating de Gaulle's inner circle.
Until now, de Gaulle was simply happy to have someone competent among his ranks, as most of his hardened veterans died while trying to defend Paris from Pétain's capture of the city.